Improvement in window-screens



UNITEn STATES PATENT IMPROVEMENT IN WINDOW-SCREENS.

Specification forming part of Letters Patent-N0. l32,139, dated November5, 1872.

Td all whom may concern: p

Be it known that I, WiLLIAM H. SMITH, of

- Charlestown, in the county of Middlesex and State of Massachusetts,have invented an Improved Mosquito-Frame for Vindows; and do herebydeclare the same to be fully described in the following specificationand represented in the accompanying drawing, in which- Figure l denotesa front elevation of my invention as applied to a window-frame. Fig. 2is a longitudinal section of my improved mosquito-frame. A

The object of my invention is to provide a simple and eifect-ivemosquitoframe-one so constructed as-to be readily expanded or contractedin order to t window-frames of different widths, and capable of beingeasily applied and secured to the frame of a window or removedtherefrom, as may be desirable; and my invention consists in theconstruction and arrangement of the several parts of the device, ashereinafter set forth and claimed.

In the said drawing, A A and B B denote the four bars constituting theframe, the abutting ends of the said bars being inserted within andmaintained by four angular metallic clamps or sleeves, a a a a. Each ofthe top and bottom bars A and A are inserted loosely withintheirsleeves, so as to permit the side bars B and B with the angularsleeves to be moved either outward or inward in order to t the sides ofthe Window-frame. The mechanism or device for adjusting the frame to thewidth of the window-opening consists of the rod C, which is disposedwithin and extends transversely and centrally across the' frame, and issupported in socket-plates b b affixed to the inner faces of the bars BB. The said rod carries on its respective ends a right and left malescrew, which work in corresponding female screws formed in the bars B B.By rotating the said rod in the proper direction the frame may be eitherexpanded or contracted in Width, as may be desirable. The opening in theframe may be covered with webbing or gauze afxed to the inner face ofthe bars in the ordinary manner.

In applying my improved device to a window-frame I first affix to eachside of the said 'frame a narrow bead or strip extending the wholelength of the frame, the inner vertical sides of 'the device restingagainst the same, and so as to be capable of being moved freely up anddown so as to cover either the upper or the lower part of the window, asmay be desirable.

From the above it will be seen that a device constructed in the manneras above described can be readily applied to Windows varying in width,and adjusted and held in place by simply turning the rod C in the properdirection, such bringing the vertical bars of the frame or device intocont-act With the contiguous sides of the window-frame with anydesirable degree of impact.

Having described my invention, what I claim is- The improved expandingmosquitoframe for windows, composed of the four bars A A and B B', theangular metallic connections or sleeves a a a a, and the screw-rod C,the whole being constructed, arranged, and applied together in themanner and so as to operate as set forth.

WM. H. SMITH.

Witnesses:

F. P. HALE, F. C. HALE.

